Q&A community for developers.

Largest online art community with millions of original works

Photo sharing and photography community for enthusiasts

Startup data, funding rounds, investors and company profiles

Community platform for software developers to write and learn

Online courses and degrees from top universities and companies

Online front-end code editor, showcase and community

Book reviews, reading lists and community recommendations

Free online courses from MIT, Harvard and 160+ institutions

Free MIT course materials published openly on the web

GPS fitness tracking for runners, cyclists and athletes

Social film diary, movie lists and reviews community

World's largest board game database and enthusiast community

Q&A platform where experts and enthusiasts share knowledge

Network of communities for every topic and interest

Official site of the United Nations — peace and world affairs

High-speed train through the Channel Tunnel linking UK and Europe